Chemical corrosion resistant fluid power pump

Abstract

The utility model discloses a chemical-corrosion-resistant fluid power pump, which relates to the technical field of fluid power pumps and comprises a pump body, a pump body protection clamping plate, an impeller, an impeller locking nut, a pump shaft, a mechanical seal, a bearing support, a bearing, a mechanical seal gland, an inner flushing circulating groove, a coupling, a pump cover, a sealing ring, a liquid level intelligent signal detector, a motor and a base. The fluid power pump resistant to chemical corrosion has the advantages of being capable of stably operating under the conditions of strong corrosive media, large temperature sudden change, no external washing, high temperature and high pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid power pumps, in particular to a chemical corrosion resistant fluid power pump. Background Art

[0002] With the rapid increase in production capacity in the chemical, steel, pharmaceutical, environmental protection, and new energy industries, these industries have placed higher technical requirements on the equipment used in pipeline fluids. Traditional power pumps cannot meet user needs. To this end, our company has innovated the structure of traditional power pumps and proposed a new chemical corrosion-resistant fluid power pump to enhance product competitiveness. Utility Model Content

[0003] The utility model provides a chemical corrosion resistant fluid power pump. The newly proposed chemical corrosion resistant fluid power pump has the characteristics of being able to stably operate under highly corrosive media, large temperature changes, no external flushing, high temperature and high pressure.

[0004] The utility model provides the following technical solutions to achieve the above-mentioned purpose:

[0005] A chemical corrosion-resistant fluid power pump includes a base with a motor provided on the base; the motor is connected to the pump shaft via a coupling, and the pump shaft is sleeved in a bearing bracket fixed on the base near the coupling, and a bearing is provided between the bearing bracket and the pump shaft; the end of the pump shaft away from the coupling is keyed to the impeller, and the impeller is provided in the inner cavity of the pump body, and a pump cover is provided on the side of the pump body near the bearing bracket, and the pump cover and the pump body are fixed front and back by protective splints provided on the base; a mechanical seal is provided at an internal position of the pump cover and around the pump shaft, and the dynamic ring and static ring of the mechanical seal are fixed to the fixed positions of the impeller and the pump cover by relying on each other to form a rotary seal, and the mechanical seal pressure cover provided on the outside of the mechanical seal fixes the static ring by bolts.

[0006] In the aforementioned chemical corrosion resistant fluid dynamic pump, the impeller is connected to one end of the pump shaft by a keyway and is locked with the sealing ring by the outer impeller locking nut; a sealing ring groove adapted to the sealing ring is provided on the sealing surface of the impeller locking nut.

[0007] In the aforementioned chemical corrosion resistant fluid dynamic pump, the outer structure of the impeller locking nut is hexagonal, the inner structure is coarse thread, and the material is stainless steel sprayed with a polytetrafluoroethylene plastic layer.

[0008] In the aforementioned chemical corrosion resistant fluid dynamic pump, the bearing bracket includes a bracket body arranged around the bearing, and the bracket body is integrally provided with multiple arc-shaped arc-shaped plate portions that abut against the outside of the pump cover, and the ends of the arc-shaped plate portions are annular portions.

[0009] In the aforementioned chemical corrosion resistant fluid dynamic pump, the protective clamping plate and the bearing bracket are sprayed with a polytetrafluoroethylene plastic layer.

[0010] In the aforementioned chemical corrosion resistant fluid dynamic pump, the impeller is arranged with twisted outlet straight blades and is made of corrosion resistant polymer plastic or fluoroplastic.

[0011] In the aforementioned chemical corrosion resistant fluid dynamic pump, an internal flushing circulation groove is provided in the pump cover. After liquid enters the pump cavity, during the pump startup process, the liquid flows out of the circulation groove and enters the friction pair surface of the mechanical seal 6.

[0012] In the aforementioned chemical corrosion resistant fluid dynamic pump, a liquid level intelligent signal detector is provided in the pump cover leading to the pump chamber.

[0013] In the aforementioned chemical corrosion resistant fluid dynamic pump, the coupling cover is arranged in a protective cover arranged on the base.

[0014] Compared with the prior art, the chemical corrosion resistant fluid dynamic pump provided by the present invention has at least the following beneficial effects:

[0015] 1. The impeller locking nut of this utility model is characterized by a sealing ring groove provided on the sealing surface, a hexagonal outer structure, a coarse internal thread structure, and is made of stainless steel with a polytetrafluoroethylene coating. This prevents the impeller locking nut from loosening due to thermal contraction and shrinkage when the pump experiences temperature fluctuations, thereby ensuring stable pump operation without leakage. Existing designs use plastic locking nuts. Due to the significant thermal expansion and contraction of the plastic, these threads can loosen, causing the impeller to withdraw and leak.

[0016] 2. The impeller of this utility model is mounted within the inner cavity of the pump body and connected to one end of the pump shaft via a keyway. The impeller lock nut on the outside is locked to the sealing ring. The impeller features a twisted inlet and straight outlet blade design, made of corrosion-resistant polymer plastic or fluoroplastic. This keyway connection prevents the impeller from withdrawing when the motor reverses, enabling stable operation of the pump at relatively high temperatures (160°C) and high pressures (1.0 MPa). Furthermore, the twisted inlet and straight outlet blade design improves pump efficiency compared to existing designs.

[0017] 3. This utility model features an internal flushing circulation groove within the pump cover. Once liquid enters the pump chamber and the pump is started, it flows out of the circulation groove onto the mechanical seal friction pair, flushing away friction heat and contamination. Compared to existing designs, this eliminates the need for external flushing of the seal water, significantly conserving water resources.

[0018] 4. The utility model provides a liquid level intelligent signal detector in the pump cover, which is connected to the pump cavity. Through intelligent signal detection, the pump cannot be started when there is no liquid in the pump cavity. The pump can only be started when it is detected that the pump cavity is full of liquid. Compared with the existing design, the pump is protected from dry grinding and high-temperature burning of the mechanical seal when starting without liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top view of the chemical corrosion resistant fluid dynamic pump;

[0020] Figure 2 It is a side view schematic diagram of the structure of a chemical corrosion resistant fluid dynamic pump;

[0021] Figure 3 It is a schematic diagram of the front view of the structure of a chemical corrosion resistant fluid power pump;

[0022] Figure 4 Schematic diagram of the internal structure of a chemical corrosion resistant fluid dynamic pump (half cutaway);

[0023] Figure 5 for Figure 4 An enlarged schematic diagram of the structure in the middle left part;

[0024] Figure 6 This is a schematic diagram of the structural design of a chemical corrosion resistant fluid dynamic pump;

[0025] Figure numerals: pump body 1, pump body protection splint 2, impeller 3, impeller locking nut 4, pump shaft 5, mechanical seal 6, bearing bracket 7, bearing 8, mechanical seal gland 9, internal flushing circulation groove 10, coupling 11, pump cover 12, sealing ring 13, liquid level intelligent signal detector 14. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Example. A chemical corrosion resistant fluid dynamic pump, the structure of which is referenced Figure 1-6As shown, it includes a base, on which a motor is provided, and the motor is connected to the pump shaft 5 via a coupling 11. The pump shaft 5 is sleeved in a bearing bracket 7 fixed on the base near the coupling 11, and a bearing 8 is provided between the bearing bracket 7 and the pump shaft 5; the end of the pump shaft 5 away from the coupling 11 is keyed to the impeller 3, and the impeller 3 is arranged in the inner cavity of the pump body 1, and a pump cover 12 is provided on the side of the pump body 1 close to the bearing bracket 7. The pump cover 12 and the pump body 1 are fixed front and back by a protective splint 2 provided on the base; a mechanical seal 6 is provided at an internal position of the pump cover 12 and around the pump shaft 5, and the dynamic ring and the static ring of the mechanical seal 6 are fixed to the fixed positions of the impeller 3 and the pump cover 12 by mutual support to form a rotary seal, and the mechanical seal pressure cover 9 provided on the outside of the mechanical seal 6 fixes the static ring by bolts.

[0028] The working principle and usage of this chemical corrosion-resistant fluid power pump are the same as those of a conventional power pump. After being installed and fixed on the base, the motor is started. The motor drives the impeller 3 to rotate through the coupling 11 and the pump shaft 5. The fluid is delivered by the high-speed rotation of the impeller 3 in the pump chamber.

[0029] The main design points of this power pump that are different from conventional power pumps are as follows:

[0030] A mechanical seal 6 is installed inside the pump cover 12 and around the pump shaft 5. The dynamic and static rings of the mechanical seal 6 are mutually secured to the impeller 3 and the pump cover 12, forming a rotary seal. A mechanical seal gland 9, located outside the mechanical seal 6, secures the static ring with bolts, ensuring stable operation. The pump cover 12 and pump body 1 are secured front to back using protective clamps 2 mounted on the base, ensuring stable operation at relatively high temperatures (160°C) and high pressures (1.0 MPa).

[0031] The pump cover 12 and the pump body 1 are fixed front and back by the protective splint 2 set on the base. The protective splint 2 is designed as two protective plates in front and back, and is connected by high-strength bolts to protect the flow-through parts, the pump body 1 and the pump cover 12. The shape has unique curves and beautiful lines.

[0032] The impeller 3 is connected to one end of the pump shaft 5 by a keyway and is locked to the sealing ring 13 by the outer impeller locking nut 4. The sealing surface of the impeller locking nut 4 is provided with a sealing ring groove that matches the sealing ring 13. Due to the key connection, the impeller 3 can be prevented from moving out when the motor changes its rotation direction.

[0033] The impeller locking nut 4 has a hexagonal outer structure and a coarse thread inner structure. It is made of stainless steel and sprayed with a polytetrafluoroethylene plastic layer.

[0034] With this structure, the impeller locking nut 4 will not loosen due to thermal contraction when the pump is exposed to temperature fluctuations, preventing the impeller 3 from being pulled out, thus ensuring stable pump operation without leakage. Existing designs using plastic locking nuts, which expand and contract significantly with temperature fluctuations, can cause the plastic impeller locking nut threads to loosen, leading to impeller pullout and leakage.

[0035] The bearing bracket 7, which supports the rotating mechanism, includes a main bracket portion surrounding the bearing 8. This bracket portion is integrally formed with multiple curved plates that abut against the outside of the pump cover 12, each with a ring-shaped end. This structure, as shown in the accompanying drawings, is stable and reliable. The bearing bracket 7 is an integrated design, connected to the rear plate of the protective splint 2 with high-strength locating bolts. Its diamond-shaped design, with distinctive curves, lines, and prominent angles, creates a smooth overall appearance.

[0036] The protective splint 2 and the bearing bracket 7 are sprayed with a polytetrafluoroethylene plastic layer.

[0037] The impeller 3 features twisted straight blades at the inlet and outlet, and is made of corrosion-resistant polymer plastic or fluoroplastic. This design improves pump efficiency compared to existing designs. High-strength reinforced nanoplastic is also preferred.

[0038] The pump cover 12 is provided with an internal flushing circulation groove 10. After the liquid enters the pump cavity, during the pump startup process, the liquid flows out of the circulation groove 10 and enters the friction pair surface of the mechanical seal 6, thereby realizing internal flushing to remove friction heat and contamination, and the pump can operate stably when there is no external water flushing in the system.

[0039] The pump cover 12 leads to the pump chamber and is equipped with a liquid level intelligent signal detector 14. This structure realizes intelligent signal detection. When there is no liquid in the pump chamber, the pump cannot be started. The pump can only be started when the pump chamber is full of liquid. Compared with the existing design, the pump is protected from dry grinding and high temperature burning of the mechanical seal during liquid-free starting.

[0040] The coupling 11 is housed in a protective cover mounted on the base. The protective cover features a diamond-shaped design with unique curves, lines, and prominent corners, giving the product a smooth overall appearance. It is bolted to the base to protect against rotational damage.

[0041] In terms of materials, in general, the flow-through parts of the pump are made of high-strength reinforced nano-plastic, which is resistant to strong corrosion, high temperature, and aging; it is also resistant to thermal expansion and contraction.

[0042] The protective splint 2 and the bracket 7 are made of cast steel surface sprayed with dispersed polytetrafluoroethylene resin with a thickness of 0.4mm to 0.6mm, so that the product will not be corroded even in a working environment with large acid mist.

[0043] The base is also made of steel surface sprayed with 0.4mm to 0.6mm thick dispersed polytetrafluoroethylene resin, so the product will not be corroded even in a working environment with large acid mist.

[0044] Through the above-mentioned material selection and structural limitations, this product can be used for the transportation of multifunctional chemical corrosive fluids, wastewater treatment fluid transportation, waste acid purification treatment fluid transportation, phosphorus chemical corrosive fluid transportation, agricultural pharmaceutical engineering corrosive fluid transportation, electronic semiconductor corrosive fluid transportation, pharmaceutical engineering corrosive fluid transportation, and food engineering corrosive fluid transportation.

[0045] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A chemical corrosion resistant fluid dynamic pump, comprising a base, a motor disposed on the base, characterized in that: The motor is connected to the pump shaft (5) via a coupling (11), and the pump shaft (5) is sleeved in a bearing bracket (7) fixed on the base near the coupling (11), and a bearing (8) is provided between the bearing bracket (7) and the pump shaft (5); the end of the pump shaft (5) away from the coupling (11) is key-connected to the impeller (3), and the impeller (3) is arranged in the inner cavity of the pump body (1), and a pump cover (12) is provided on the side of the pump body (1) close to the bearing bracket (7), and the pump cover (12) and the pump body (1) are fixed front and back by a protective splint (2) provided on the base; a mechanical seal (6) is provided at an inner position of the pump cover (12) and around the pump shaft (5), and the dynamic ring and the static ring of the mechanical seal (6) are mutually supported and fixed at the fixed position of the impeller (3) and the pump cover (12) to form a rotary seal, and a mechanical seal gland (9) provided on the outer side of the mechanical seal (6) fixes the static ring by bolts.

2. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The impeller (3) is connected to one end of the pump shaft (5) by a keyway and is locked with the sealing ring (13) through the outer impeller locking nut (4); a sealing ring groove adapted to the sealing ring (13) is provided on the sealing surface of the impeller locking nut (4).

3. The chemical corrosion resistant fluid dynamic pump according to claim 2, characterized in that: The impeller locking nut (4) has a hexagonal outer structure and a coarse thread inner structure, and is made of stainless steel with a polytetrafluoroethylene plastic layer sprayed on the outside.

4. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The bearing bracket (7) includes a bracket main body arranged around the bearing (8), and the bracket main body is integrally provided with a plurality of arc-shaped arc-shaped plate portions that abut against the outside of the pump cover (12), and the ends of the arc-shaped plate portions are annular portions.

5. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The protective splint (2) and the bearing bracket (7) are sprayed with a polytetrafluoroethylene plastic layer.

6. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The impeller (3) is provided with twisted outlet straight blades and is made of corrosion-resistant polymer plastic or fluoroplastic.

7. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The pump cover (12) is provided with an internal flushing circulation groove (10). After liquid enters the pump cavity, during the pump startup process, the liquid flows out of the circulation groove (10) and enters the friction pair surface of the mechanical seal (6).

8. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The pump cover (12) leads to a pump chamber in which a liquid level intelligent signal detector (14) is provided.

9. The chemical corrosion resistant fluid dynamic pump according to claim 1, characterized in that: The coupling (11) is covered in a protective cover provided on the base.

Images